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Kubernetes YAML Validator

Schema-check your Kubernetes manifests in the browser. No cluster connection is made.

Runs entirely in your browser - nothing is uploaded and no cluster connection is made.
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Your validation report will appear here.

About Kubernetes YAML Validator

Small YAML mistakes break deployments. The Kubernetes YAML Validator parses your manifest in the browser and checks the essentials: apiVersion, kind and metadata.name, plus resource-specific rules like requiring containers on a Pod.

Paste one or more documents (separated by ---) and get a clear pass/fail report with the offending lines. Everything runs locally and nothing is uploaded.

Features

  • Required fields - apiVersion, kind, metadata.name.
  • Resource rules - containers, replicas checks.
  • Names - RFC 1123 label validation.
  • Multi-doc - validate each --- document.
  • Copy / Download / Print - take the report anywhere.

How to Use

  1. Paste YAML into the textarea.
  2. Click validate.
  3. Read the report.

Examples

Example 1 - valid pod. apiVersion v1, kind Pod, metadata.name, spec.containers.

Example 2 - missing name. flagged as an error.

Benefits

  • Fast feedback - catch mistakes before apply.
  • Private - runs in the browser.
  • Multi-doc - validate several at once.
  • Copy, download or print - keep the report.

Frequently Asked Questions

What does this validator check?
It parses the YAML and verifies required fields: apiVersion, kind and metadata.name, plus resource-specific rules such as containers on Pod-like kinds.
Is it a full schema validator?
It performs structural and common schema checks (required keys, naming, container presence). It is not a full OpenAPI validation but catches the most common mistakes.
Does it call the cluster?
No. Parsing and validation happen entirely in your browser; nothing is uploaded.
Can I validate multiple documents?
Yes. Documents separated by --- are validated individually and results are reported per document.
What about names?
metadata.name (and container names) are checked against the RFC 1123 label rules.
Can I copy the report?
Yes. Copy, download or print the validation report.

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